Power jack for motor vehicles



W. P. BEALL.

PDWER JACK FOR MOTOR VEHICLES. 'l APPLicAnoK meu Juris 21. 1922.

Paten'e Nov. 21, 1922.

lll HUI-h Patented Nov. 21, 1922.

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"rowna .mon non Application led .Tune 27,

To all whom t may concern.'

' Be it known that I, WILLIAM i). BEALL, a citizen of the United States, residing at Stevenson, in the county of Baltimore and State of Maryland, have invented new and useful improvements in Power Jacks for Motor Vehicles, of which the following is a specification.

My invention relates to improvements `in power distributing apparatus for use in connection with the rear wheels of. an automobile. y p,

An iniportantobject of the invention is to provide `-apparatus of the above men tionc'd character which is strong, durable, simple in construction and convenient to operate.

A further object of the invention is to provide an improved form of thrust bearing for receiving the power distributing shaft and connected with the frame of the apparatus in a manner whereby the life of the bearing is prolonged.

Other objects and advantages of the in vention will be apparent during the course of the following description.

In the accompanying drawings forming a part of this specification and in which like numerals are employed to designate like parts throughout the same.

Figure 1 is a side elevation of apparatus embodying my invention.

Figure 2 is a plan view of the same.

Figure 3 is a transverse section taken on line 3-3 of Figure 2, and, e

Figure 4 is a perspective view of the i thrust bearing.

In the drawings, wherein for the purpose of illustration is shown a preferred embodiment of my invention, the numeral, 5 designates side members of a frame. Each side member is preferably formed of a channel iron or bar, having a horizontal lower portion 6, bent upwardly at its forward end to provide a vertical portion 7. At the upper end of this vertical portion the channel bar is bent downwardly and rearwardly, forming a forward upper inclined portion 8, having a rear upper horizontal portion 9 at its lower end. At the rear end of the portion 9 the channel iron is bent at a right angle forming a vertical portion or leg l0, having a horizontal eX- MOTOR VEHICLES.

1922. Serial No. 57h27?,

and diagonal braces or brace 14 is secured' to the horizontal brace 13, between its ends, as shown at 15. The upper ends of the brace'or braces 14 are secured to the upperA portions of the forward vertical portions '1, as shown at 16. rlfhe numeral 17 designates vertical braces interposed between the inclined' portions 8 and the horizontal por tions 6 and rigidly secured thereto. The rear ends of the horizontal portions 6 are connected by a transverse brace 18, rigidly secured thereto, and a diagonal brace 19 is arranged upon the brace 18 and secured thereto, as shown at 19. rilhe upper ends of this diagonal brace 19 are rigidly secured to the rear ends of the upper horizontal portions 9.

Arranged upon the horizontal portions 9 of the side members, near the lower ends of the inclinedvportions 8, are thrust bearing blocks or elements 20, having bases 21, which are tapered in transverse section, to iit snugly within the recesses of the channel bars, as clearly shown in Figure 3.

The bases 21 are rigidly secured to the upper portions 9 by bolts 22, and the bearing blocks 2O have transverse recesses or f openings 23, rotatably receiving a transverse power distributing shaft 24. Plates 25 are arranged forwardly of this shaft 24, to hold the same against displacement, and these plates are secured to the blocks by bolts 26.

A power distributing pulley 27 is rigidly secured to the shaft 24 near its center, and this pulley is adapted to beengaged by a belt 28, as shown. A secon-d pulley 29 may be secured to either end of the shaft 24, to rotate therewith, and these pulleys may be secured to both ends of the shaft, or at any other suitable point thereon if desired.

-Rigidly secured to the end portions of the shaft 24 are drive pulleys or wheels 30, adapted to contact with the rear wheels 81 of the automobile, carried by the rear axle 32.

In the use of the apparatus, the frame is inclined and the forward end thereof inserted beneath the rear axle 32, in contact therewith. When the rear end oi the frame is moved downwardly, the forward end thereof elevates the axle 32 and raises the wheels 3l out of contact with `|the ground, the axle 32 now contacting with the in clined portions A8, and sliding down the same until the wheels 31 trictionally engage the pulleys or wheels 30, to drive them. Particular attention is called to the tact that the bearing elements or blocks 20 are not carried by the inclined portions 8, but are secured to the horizontal portions 9, near the rear ends of such inclined portions. By the peculiar' shape, arrangement, and mounting ot the thrust bearing blocks, it has been iound that they are adapted to effectually withstand the severe strains and wear, inherent in such a machine, whereby their life is greatly prolonged.

It is to be understood that the form of my invention herewith shown and ldescribed is to be taken as a preferred example of the same and that various changes in the shape, size, and arrangement of parts, may be resorted to, without departing from the spirit of my invention or the scope of the subjoined claim.

Having thus described my invention, what I claim is:

In apparatus of the kind described, a. frame including spaced side members each constructed of a single length of bar metal of channel iron cross section with the flanges outwardly disposed, said bar metal being formed to provide a horizontal base portion, bent vertically upward. to provide a front end portion, bent downward from the top of the end portion at an acute angle to said end portion, bent at an obtuse angle to the last portion to lie horizontally and parallel to the base, bent downward and then rearward to provide a rear end portion and foot, the latter resting on the rear end of the base portion and secured thereto, in combination with a pair of bearings each having a base wedge shaped to ft tightly in the respective channel section, said bearings being located on the upper portion close to the inclined portion and bolted to said horizontal portion whereby to decrease the shearing stresses on the bolts.

WILLIAM P. BEALL. 

